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'2,She"et s-Sheet 1. G. MARSH MOVABLE JETTY.

' Patented July 1, 1890.

(No Model.) 2 Sheets-Sheet 2. G. MARSH. MOVABLE JETTY.

Patented July 1, 1890.

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* UNITED STATES PATENT" OFFICE.

GRANT MARSH, OF OAPE GIRARDEAU, ASSIGNOR OF THREE-FOURTHS TO TURNER T. LEW'IS AND OLIVER L'. GARRISON, OF ST. LOUIS, MISSOURI, AND JAMES H. REES, OF MEMPHIS, TENNESSEE.

MOVABLE J ETTY.

SPECIFICATION forming part of Letters Patent No. 431,524, dated July 1, 1890.

. Application filed March 17, 1890- Serial No. 344,260. (No model.)

To all whom it may concern: sealed together in its several parts so as to Be it known that I, GRANT MARSH, a citibe water-tight throughout, except at the openzen of the United States, residing'at Cape ings 2), arranged to receive and be governed Girardeau, in the county of Cape Girardeau by the gate-valves g, for the purposes here- 5 and State of Missouri, have invented certain inafter specified, and the' openings made in new and useful Improvements in Movable the top to receive the suction-pipes h of the Jetties, of which the following is a full, clear, pumps H, to be used as hereinafter specified. and exact description. The form of the jetties is to be as follows: The

My invention relates to improvements in height from bottom to top is to be, preferably,

10 means and devices for deepening the shallow the same throughout its entire length, dividplaces in the channels of navigable streams. ing the jetty or barge in its length into three The object of my invention is toconfine parts or sections, preferably, and for the purand direct the water flowing through a naviposes hereinafter specified, into three parts gable water-Way to a certain part of such Waor sections of equal length, the middle part d I 5 ter-way, thereby increasing the relativeflow (Z 61 (Z to be of equal width or beam through- I or current, and consequently increasing the out, and the two end parts 01 d e to be alike 65 scouring or dredging capacity of the waterof the same length, tapering equally on both flow at such point, and, further, that this be sides from the width or beam of the middle accomplished by means and devices as shall part to apoint 6, so as to form an edge e e 20 not offer any material obstruction or impedithe full height of the jetty, for the purposes ment to navigation while in use, and that the hereinafter specified. 7o devicesused shall be designed andconstructed The interior of the jetty or barge is to be 'in such manner as to permit of their being divided into several water tight compartreadily removed when the desired results are ments a, first by a mid-rib or keelson-piece 0,

25 effected. I attain these objects by the means extending from end to end and from bottom J and devices hereinafter described. to top and fastened to same. These two 7 5 Like letters of reference denote like parts halves, to be subdivided by the partitions or in all the figures. walls 1), run from the mid-wall to sides and Figure 1 is a top view of the floating jetty. fastened to same, all joints and seams to be 0 Fig. 2 is a side view of the same. Fig. 3 is a water-tight throughout, for the purposes heredetail front, and Fig. 4 a detail side View of inafter specified. Through the top and bota gate-valve used as hereinafter specified. tom, preferably at both ends, a hole j of con- Fig. 5 is a detail side view of asiphon-pump, venient size is cut through, in which a tube With supply steam-pipe and regulating-valve is fitted, the ends of the tube being hermeti- 3 5 attached used as hereinafter specified. Figs. cally sealed to the top and bottom plates, so

6 and 7 are two views of the same portion of as to form a well or water-hole through body a navigable stream. Fig. 6 shows the stream of the jetty from top to bottom.

in its normal condition, the depth of the Wa- On the top of the jetty a steam-boiler k is ter being more plainly shown in the crossplaced, capable of furnishing steam through 0 section,Fig. 8, of the bed of the stream, taken the supply-pipe i, regulated by the checkon the line r s of Fig. 6. Fig. '7 shows an exvalves Z, to the several pumps h.

ample of the placing of the jetties at such a On the jetty, preferablyat each end, is

place, the results beingshown more in detail placedacapstan or other like device, to which in Fig. 9, it being a cross-section taken at the to attach a cable or rope for the purpose of 5 same place as in Fig. 6 on the line '1' s, Fig. lashing the jetty to a steam-propeller in mov- 7, but after the jetties have done their Work. ing it about, or the jetties to. one another, as 5 The floating jetties or barges A are to be may be desired, and as hereinafter described.

constructed, preferably, of sheet or boiler iron, In practice the floating jetties will be lashed the whole to be a closed vessel fastened and to a steam-propeller or tug-boat, and transported as floating vessels or barges to the point in the stream which is or is likely to become too shallow for safe navigation, caused by low water or by the currents and counter- 5 currents piling up sand or forming a bar or reef at this point, and when placed in a V- shaped position, or other position best suited to do the required work, as at a a in Fig. 7, -with their stem and stem ends overlapping each other consecutively, as shown, so as to embrace and confine the body of the water of the stream, otherwise spread over a large area, and direct it to a comparatively narrow place at the channel part of the bed of the stream. They are then held in position by stake-pieces or spuds being put through the water-holes or wells 3'. I make use of this means of anchoring the jetties, so as not to have any drag or anchoring cables or chains to impede navigation. The forms of the ends, as described, permit of the jetties being placed in different positions relative-to each other without presenting any corners or abrupt angles to the flow of the water, thereby abrogating any eddy currents and consequent filling in of sand in the channel. After the jetties have been placed and anchored the gatevalves are opened and the j etties allowed to fill with water until they rest on the bottom of the stream and the gate-valves closed.

The object of dividing the interior of the jetties into separate compartments controlled independently by their several gate-valves is to permit of more water being let into one part than into another to sink thatpart deeper, so'as to accommodate different depths of water in the stream. The partition or dividing walls are also useful in strengthening and bracing the jetty as awhole. When the work intended is done, the channel deepened, and the water-flow established 'at this point, steam is furnished to the pumps from the steamboiler, as described, and the water pumped out, and the jetties floated and towed away, leaving a clear and unobstructed channel. In this manner by these devices we deepen the bed of the stream and establish in the channel a water-flow at this point, insuring conditions reasonably permanent for navigable depth of water in streams with sandy bottoms until some decided change in the stage of the water.

Rather than offering any obstruction to navigation they offer material help in guiding the vessel to deep water in the channel, being always in sight when in use. If the stage of water changes so as not to need the extra depth at this point, they are removed, leaving no submerged obstruction, as in the case of permanent dykes and wing-dams, to navigation in high water.

I claim l. The combination, with a floating jetty having a series of water-tight compartments, each provided with an induction-port and an eduction-port, a valve for the induction-ports of each of said compartments, and means, substantially as described,for withdrawing the water from each of said compartments separately, whereby the jetty may be sunk deeper at one end than at the other, or raised or lowered at one or both ends, substantially as and for the purposes described.

2. The combination, with a floating jetty,

of a series of transverse water-tight partitions which divide the jetty longitudinally into' a series of compartments, and valved inductionports for each compartment, whereby the jetty may be caused to sink more atone end than at the other, a series of steam ejector-pumps, one for each compartment, a line of piping, and steam-boiler common to all the pumps for admitting jets of steam thereto, substantially as and for the purposes described.

3. A floating jetty having a seriesof longitudin ally-arran ged water-tight compartments and long tapering or wedge-shaped ends whereby a series of said jetties may be arranged to lap and sink equally or unequally to produce a continuous wall or breakwater along the bottom, substantially as and for the purposes described.

4:. A floating jetty having a series of longitudin ally-arranged water-tight compartments and long tapering or wedgeshaped ends, whereby a series of said jetties may be an ranged to lap and sink equally or unequally to producea continuous wall or breakwater along the bottom, said jetties being provided with wells or open tubes for the passage of anchor-posts, substantially as and for the purposes described.

5. The floating jetty A, in combination with the capstans m, and the wells j, substantially as described, and for the purposes specified.

In testimony whereof I have hereunto affixed my signature,in presence of two subscribing witnesses, this 11th day of February, 1890.

GRANT MARSH. Witnesses:

J. W. CRooKEs, A. RAMEL. 

